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Elements, Compounds and Mixtures

What is Brownian Motion?

All matter is made of tiny particles.
The particles are atoms, ions or molecules.
In a liquid or gas, the particles move at random.

The random motion of particles is called Brownian Motion.
It can be seen by looking at
smoke particles in air through a microscope.

Brownian Motion

The smoke particle (shown as a blue ball) has a jerky motion.
As (invisible) air molecules collide with the smoke particle,
they push it about in different directions at random.

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